What's the difference between i.e. and e.g.?
early 15c., "encouragement;" c.1600, "something that tends to excite," from excite + -ment. Meaning "condition of mental and emotional agitation" is from 1846.
excitement ex·cite·ment (ĭk-sīt'mənt)n. An emotional state characterized by its potential for impulsive or poorly controlled activity.